eca: include a queue suitable for passing actions to a real-time OS

3d8841a0 · Wesley W. Terpstra · 0a65f5dd · 3d8841a0 · 3d8841a0 · 3d8841a0
Commit 3d8841a0 authored Nov 07, 2013 by Wesley W. Terpstra
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Showing with 478 additions and 5 deletions

Manifest.py modules/wr_eca/Manifest.py +1 -0

eca_pkg.vhd modules/wr_eca/eca_pkg.vhd +11 -5

eca_queue_channel.vhd modules/wr_eca/eca_queue_channel.vhd +466 -0

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--- a/modules/wr_eca/Manifest.py
+++ b/modules/wr_eca/Manifest.py
@@ -8,6 +8,7 @@ files = [
  "eca_sdp.vhd",
  "eca_search.vhd",
  "eca_flags.vhd",
+  "eca_queue_channel.vhd",
  "eca_walker.vhd",
  "eca_wb_channel.vhd",
  "eca_wb_event.vhd",

--- a/modules/wr_eca/eca_pkg.vhd
+++ b/modules/wr_eca/eca_pkg.vhd
@@ -180,18 +180,24 @@ package eca_pkg is
  
  -- Put the action into a queue and fire an interrupt to 'tag'
  component eca_queue_channel is
+    generic(
+      g_log_queue_depth  : natural := 8;
+      g_counter_bits     : natural := 24;
+      g_log_clock_factor : natural := 8; -- clocks q, q, i are within 256*
+      a2i_dual_clock     : boolean := true;
+      a2q_dual_clock     : boolean := true);
    port(
      a_clk_i     : in  std_logic;
      a_rst_n_i   : in  std_logic;
      a_channel_i : in  t_channel;
-      q_clk_i     : in  std_logic;
-      q_rst_n_i   : in  std_logic;
-      q_slave_i   : in  t_wishbone_slave_in;
-      q_slave_o   : out t_wishbone_slave_out;
      i_clk_i     : in  std_logic;
      i_rst_n_i   : in  std_logic;
      i_master_o  : out t_wishbone_master_out;
-      i_master_i  : in  t_wishbone_master_in);
+      i_master_i  : in  t_wishbone_master_in;
+      q_clk_i     : in  std_logic;
+      q_rst_n_i   : in  std_logic;
+      q_slave_i   : in  t_wishbone_slave_in;
+      q_slave_o   : out t_wishbone_slave_out);
  end component;
  
  -- Put low bits of param to address tag

--- a/modules/wr_eca/eca_queue_channel.vhd
+++ b/modules/wr_eca/eca_queue_channel.vhd